Water heater



June 5, 1923.

i J. FRUMVELLER WATER HEATER Filed July l. 1920 Patented .lune 5f, 1923.

unirse stares raisnfr, ortica.

JOSEPH FEUIiM-TELLER, 0F CHICAGO, ILLINOIS, VASSIGIIOR TO( VAPOR COMPANY, INC., or CHICAGO, ILLINOIS, A'conronarioN or Nnw YORK. l

' WATER HEATER. i

Application. led July 1,

To f/ZZ fwzom t may cof/mera:

Be it known that I, JOSEPH FRUMVELLER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and use-l ful Improvements in Water Heaters, of whichthe following is a specification.

My invention relates to a waterv heater of the character used in railway car waterv heating systems; a heater of this type consisting of a stove having arranged within the fire box thereof two water coils which are substantially h elical. It has been usual to form the coils withV the turns or spirals curved in the same direction, that is,.with both coils vright helixes or both left` helixes, and to dispose them in the re `box withthe spirals or turns in alternate arrangement one above the other, that is to say, with the axes of the helixes coincident. My-invention contemplates ya different construction and disposition of the coils. I employ two coils, .one in the form of a right helix andthe other in the form of a left helix, that is, one coil is curved to the right from one of its terminal portions and the other is curved to the left from correspondingk terminal portion; and instead of having'the axis of one coilcoineide with the axis of the Othercoil I dispose the coils in offset or staggered relation to each other, one being nearer the other side. As a re'sult certain important advantages are obtained: First, the efficiency of the heater is increased by the staggering of` the coils since the coilsink this staggered relation are better ex Osed to the combustible gases than in the olcFform of heater Awhere the coils had a common axis, and since the coils, as will be explained hereafter, may be arranged lower down inthe fire box without interfering with the tilting of the grate when the latter is dumped; second, the manufacture of the coils is facilitated since it is not necessary to form the lower terminal portions of the coils, that is to say, the portions of the pipes which extend to and through the wall of the stove with the usual double bends, lateral and upward, which have been necessary in heaters of this type as formerly constructed in order to avoidinterference with the grate and the vformation of which re-y quired great care in order that the vterminals might be properly aligned with the openings made in the wall of the stove and in order that there'might be as little'cross i320. seria1N0-.393,3o1.

section-al deformation of .bends as possible. Even with the most careful workmanship some deformation `at the bends or Offset portions of the coils was inevitable and this it may be said, by difplaces of bend necessarily impeded the l'flow oflnwater .throughy these portions of the pipes. p f

The invention is illustrated, in a preferred CAR HEATING.; i,

the pipes atvr the 60. minishing the cross sectional areas at the embodiment, in the accompanying drawing wherein Fig. 1 is a vertical sectional .view illusf.-V 'i cordance with my, invention.

Figs. 2 and 3 are sectional ,pl lines/2 2 and 3-3 of Fig. 1,;

trating a water heater constructed injfac an views on and vFig, 4 is a view,"in'perspective, of the 'y vtwo coils showingtheir conrguration andarrangeinent .with'relationlto each other.;

' ,Referring to the drawing, '10 designa-tes the body of the stove. whichv may be of vany desired construction-` The interior of the stove is divided by grate 11 into a coin-` bustion chamber 12 and an ash pit 13, k14. indicating the door of the ash'v pit.

the conical member 18 at the `bottom of the 1 fire box.

Vithin the fire box 12 are arranged twov i i. I

water; coils A and B, one intheform of aA r 'right helix and the other in the form offai leftv helixhthese coils being formed with upper terminal portions 19 and'20 and lower terminal portions 21 and22 which extend through openings in the Wall of the stove-100v Y and are connected with the water circula- 15 is f the smoke outlet ofthe stove and 16 the coal .magazine the stove herein shown for purtory system of the vcar'heati'ng apparatus j (not shown). The coils are disposed with,` theirturns or spirals in alternate arranges ment, one, above the other, but the axes of ther coils are not coincident, one coil being J` odset to one side of the stove and the other coil to the other side thereof. This allows the curved portions 23124.- of the lower turns ofy the coil whichv are vadjacent to lit) terminals 2l, 22, respectively, to lie close to the inner surface of the stove Wall, that is, directly above the conical bottom 18 so that they do not interfere with the tilting of the grate 1l even when the coils are arranged just above the conical bottom 18. rThat is, the baci; edge of the grate in tilting will pass up between the coils` For this reason it is possible to arrange the coils lower down in the stove, and consequently deeper in the tire, than could be done in the old torni olf heater. Preferably the irst quart r7 approximately, of each lower turn. (the portion designated by numeral or 24) extends horizontally, the coils beginning to bend upwardly from points indicated by numerals 25, 26. rlhis 'facilitates the manufacture of the coils since the bends at 25, 26 are removed at some distance from the lateral bends 27, 28 necessary tor bringing the terminals or the coil out through the wall ot the stove. In the old ype of heater one or both of the coils had to be Jformed with a sharp upward bend or offset close to the iateral bend and this double bending or offsetting of the pipe involved diiiiculties of manufacture, as

vstated above, and also resulted in impeding the water circulation through the hea-ter since some cross sectional deformation of the pipe at the place of offsetting was inevitable. Moreover, the upward oitset necessary to give clearance for tilting the grate resulted in raising the coil in the stovev by just so much, thereby diminishing the amount oit heat applied to the coil since the heat derived from direct contact of the burning coa-l is greater than that received by the upper port-ion ci' the coil from the gases ot combustion. The staggered arrangement oit the coils gives better distributionot the water pipes in the lire box and thus increases the heating eiiiciency of the device. ,n

it claim:

it water hea-ter comprising a lire box to contain a solid fuel, a grate at the bottom of the tire box arranged to tilt upwardly into the. lire box at the back of the heater and a pair of water coils in the lire bon in the form of right and left heliXes with their axes oit set laterally with respect to each other and their turns in alternate arrangement one above the other, said coils having lower terminals extending through the wall of the heater at the back thereof and lower turns arranged close to the gra-te so that the back ot' the grate in tilting may pass between them.

JOSEPH FRUMVELLER. 

